Patent GB-190305167-A (GB)
Title: Improvements in and in connection with Looms for Weaving
Inventor: HAWKINS GARDNER CHANDLER
Filed: 1903-03-05
Granted: 1904-02-18
Abstract: 5167. Hawkins, G. C. March 5. Loom driving. mechanism ; beat-up motions.-The crank shaft a, Fig. 1, is driven by spur gearing from a motor M, preferably an alternating- current electromotor of the polyphase rotary - field type, which may be started or stopped by any one of several switches. The lay is operated by a connecting-rod and crank in the usual way. Loom framework.- The front and rear uprights, which have supports for the cloth and warp beams respectively, are bolted to foot-pieces e, and are connected by cross - struts. Transverse members e<3x> may be used to give the desired rigidity. The working parts of the loom are supported by a single piece of steel tubing e', brazed to each footpiece e, and to the cross-struts. Loom shedding-motions ; shedding-levers. - The upper heald shafts d are adjustably connected by straps d<4> d5 to segmental rocker arms d<6>, d<7>, d<10>, d<11>, which are connected to levers d<8> and a rod d<9>, and are vibrated through a bell-crank lever d<12> from a crank or pitman d<13> eccentrically attached to a spur-wheel d<14> driven by a pinion d<15> on the shaft a. The lower heald shafts d<1> are connected by straps d<16> passing round a rock-shaft d<17>. Loom picking-motions; pickers; shuttle boxes; checking shuttles and pickers.-The shuttle is actuated by motors, preferably compressed-air reciprocating motors, mounted on the lay. Compressed air is supplied from a central source, or from an aircompressor driven by the worm motor, by a pipe f to a tubular member f<1> whence it passes through the tubular lay swords b, or otherwise, to air receivers f<2>. From the receiver f<2>, the air passes through a pipe f<3> to a chamber f<4> behind a cylinder f<5x>, Fig. 4. Compressed air is admitted to the cylinder f<5x>,< >when required, through a passage f controlled by a valve f<6>, and forces a piston f <7> against a sliding hammer f which is limited in its outward movement by a head f<10> coming against a bush f<9>. The hammer f is connected by a link f<11> to a slide f<12>, fitted with a rawhide buffer, which strikes and projects the shuttle S. When the shuttle is thrown from the opposite side, it strikes the buffer of the slide f <11>, which is returned to its operative position, and with it the hammer f <8> and piston f <7>, the air escaping to the atmosphere through an exhaust port f<14>. The valve f<6> is normally held in the exhaust position by a lever connected to a sliding spring-controlled valve-rod f<16>, which is moved to carry the valve into its operative position when the lay is drawn back, by coming against a stop f<19> secured to a sleeve g, rotatably mounted on a fixed rod g<1>. The stop f <19> is moved out of the path of the rod f<16> at every alternate backward motion of the lay, by the sleeve g being rotated by linkwork actuated by a pin on the connecting- rod d<13>, which actuates the shedding-motion. The picking-mechanism at the other side of the loom is similarly controlled by mechanism actuated by a pin on a reciprocating rod connected by a bellcrank lever h and rod h<1> to the heald-operating lever d<8>. Loom weft-replenishing mechanism.-In the Provisional Specification, it is stated that feeler-finger mechanism, actuated by a revolving shaft on the loom or by electricity or compressed air, may be employed to substitute a full shuttle for an exhausted or nearly-exhausted shuttle, and to expel the used shuttle. The full shuttles are obtained from a stationary hopper or a revolving turret. Fresh cops or bobbins may similarly be substituted for exhausted ones. Shuttleless looms ; weft, supplying. - In the Provisional Specification, it is also stated that when a weft carrier is used which is provided with means, such as opening and closing jaws, for seizing the weft when properly presented, and carrying it through the shed, the weft may be let off continuously from a ball, cop, or bobbin of yarn outside the carrier, and suspended from a bracket on the loom, or resting on the floor. Single lengths or strips of weft may be similarly inserted.